Financing Receivables and Allowance for Losses (Allowance for Losses on Financing Receivables) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Financing Receivable [Line Items]
Balance at January 1	$ 4,104	$ 4,025
Balance at June 30	3,393	4,165
CLL [Member]
Financing Receivable [Line Items]
Balance at January 1	21	17
Provision charged	8	7
Other	9	(1)
Gross write-offs	(11)	(6)
Recoveries	4	5
Balance at June 30	31	22
Commercial [Member]
Financing Receivable [Line Items]
Balance at January 1	93	44
Provision charged	29	31
Other	9	(3)
Gross write-offs	(44)	(15)
Recoveries	4	7
Balance at June 30	91	64
Consumer [Member]
Financing Receivable [Line Items]
Balance at January 1	4,011	3,981
Provision charged	3,869	1,804
Other	(257)	(67)
Gross write-offs	(4,785)	(2,184)
Recoveries	464	567
Balance at June 30	3,302	4,101
Energy Financial Services [Member]
Financing Receivable [Line Items]
Balance at January 1	26	8
Provision charged	17	13
Other	0	0
Gross write-offs	(20)	(2)
Recoveries	0	2
Balance at June 30	23	21
GECAS [Member]
Financing Receivable [Line Items]
Balance at January 1	46	17
Provision charged	(11)	11
Other	0	0
Gross write-offs	0	(7)
Recoveries	0	0
Balance at June 30	35	21
Other Commercial [Member]
Financing Receivable [Line Items]
Balance at January 1	0	2
Provision charged	15	0
Other	0	(2)
Gross write-offs	(13)	0
Recoveries	0	0
Balance at June 30	$ 2	$ 0